Sharpener for slicing machines



Sept. l0, 1929. A, c. sENsow SHARPENER Fon sLIcING MACHINES Filled May25, 1925 Patented Sept. 10, 1929.

UNirEn STATES ANTON c. sENsOw, OFSLA PORTE, lINDIANA,y AssIeNOR To U.s'. sLIcrNe MACHINE QOMPANY. or LA yPortier.,rNnrANA, A CORPORATION OFINDIANA.

PArENr OFFICE.

SHARPENERFOR sLIcING MACHINES.

Application. filed May 25,

This invention relates to mechanismk for 'sharpening the rotary `diskknives of slicing machines, and has'fo'r its ob]- ect the provision ofimproved meansi'or preventing rotation 5 of the longitudinally slidingbearings -for the Sharpener spindles.

The invention is exempliiied in the Vcomination and arrangement of partsshown in the accompanying drawings and described in the followingspecicatiomand it is more particularly pointed outin the appendedclaims.

In the drawings, y.

Fig. 1 is a horizontal section through the casing of a sharpenei`showing one embodiment of the present invention applied thereto.

Fig. 2 is a rear view of the Sharpener with the cover plate removed. i f

The forml of Sharpener illustrated is similar to that disclosed inPatent No. 1,039,210,

l granted to Hendrik StukarafSeptember 24,

1912. In that patent a pair of ygrinder spindles is provided which havelongitudinal sliding movement to carry'the grinders toward and away fromthe knife. As illustrat- '25 ed in Fig. 3 of the drawings, the rbearingsfor the spindles slide longitudinally and are pre'- vented from rotationby a pin 35, which trav elsin a groove 36 formed in the sliding spindie.It/lias been found in practice that this arrangement in some casesoiiers sufficient resistance to the longitudinal' movement of thespindle to interfere with `the best operation of the device. Itis notedthat the bushing is under spring` tensionand yis moved by a camoperating at the end of an arm 59. This cam produces considerablektorsion, on the bushing so as to cause it to bind againstthe pin andthus interfere with the free movement of the bushing` in a longitudinaldirection. The present invention overcomes this difiicul'ty andat theSametime provides a device which greatly yfacilita-tes the assembly ofthe parts .and one which will not be ai"- ected by wear. f l' 1 In thedrawings the numeral 10 designates a casing supported by a standar-d 11,which is mounted on the slicing machine frame in the usual manner. Thetrame 10 is provided 'with a front plate 12 having sleeves 13 and 1.925.serial 1ro/32,753.

14 formed thereon; The sleeve 13 is provided with a collar 15 in which abearing bushing 16 isslidably mounted. The collar 15 may be rotated inthe sleeve 13 and locked in different positions for `changing theangular position of the bushingl, as explained in the Stukart patentreferred to above. The

sleeve 14 is also provided witha collar in whichthe bearingbushing 17 isslida-bly mounted. A springlS normally presses the bearing bushing 16and the grinder Spindle 19 shown therein forwardly or outwardly from theAplate 10.y A similar springy 20 tends to retract the bushing 17 andgrinder spindle y17 journaled therein.y The spindle 19 carries a grinder19 at the outer end thereof and the spindle 17 carries a grinder 17 atits outer end. By this arrangement the two grinders are yieldingly drawntoward the slicing'machine linifeffrom opposite sides thereof. Cammechanism is provided for pressing the springs 18 `and 20 to iorcexthe,Sharpeners away from the knife, This mech- Ito the bushing17 by a screw30. Formed integrally with and extending upwardlyfrom vthe arm 26 is apost 31, yand a similar post 32 extends upwardly from the arm 29. Asleeve 33 is mounted on thetopyof the post 31 and is pivotally attachedthereto by a pivot screw 34.- threaded into the end of the post 31 andprovided with a stop shoulder to prevent the screw-ffrom binding on they'sleeve 33.

In this way the sleeve 33 yis freetoswing about the screw 34 asa pivot.A lsleeve 35 is Similarly mounted by rmeans of a screw 36 on top of thepost 32. A pin k37 is freely slidable in the sleeves 33 and 35 sothatthe pin holds the sleeves in longitudinal alignment, but permitslongitudinal movement in kthe direction of their axis. It Will beapparent that by this arrangement the bearing bushings 16 and 17 will beheld against rotation in their respective collars, but Will remain freeto slide therein under the action of the springs 18 and 2O and theca1n'21. The sliding movement of the two bearing bushings may take placeseparately or simultaneously, since the vtelescoping action of thesleeves 33 and 35 on the pin 37 will permit independent longitudinalmovement of the bearing bushings. The arrangement willnotinterfereWiththeadjustment of the collars which hold the bearing bushings inplace since the sleeves and pin do not in any Way interfere with theposition of the ends of the bearing bushings,but merely hold themagainst rotation. In practice it rangement previously used forpreventing rotation of the bearing sleeves. Thepresent arrangement canbe ymuch more quickly assembled Without the necessity of fitting andadjusting so that there is considerable saving in the time required forthe manufacture of the device. Y n A In operation. the grinder issupported on the slicing machine with the grinder disc 19 adjacent thebeveled edge of the knife and the grinder disc 17 adjacent the straightside of the edge. j The grinder discs are held away from the knife bythe cam'21 vvhichis rotated to bear against the-rollers 24 and 25 andcompress the springs 18 and 20. When it Vis desired to sharpen theknife` the handle 21 is moved to a. positionto release ythe cam roller'24 to permit the disc 19 to engage the beveled edge of theknife. r Theknife' is then rotated While in contact with the grinder disc 19 tosharpen the knife. Further movement of the handle 217 will then releasethe cam roller 25 to permit the disc 17 to engage the straight side ofthe knife edge and remove any burr formed bv the grinding operation.

vThe handle is then 'returned to the left away from the position shownin the drawing to retract both stones from-contact with the knife.

I claim: f 1.v In combination, a 'pair of lrotary spindies,longitudinally movable bearing bushings for said spindles, and means for.preventing rotation of said bushings, said means comprising anextensible arm having the opposite ends thereof pivotally connected withsaid bearing bushings.

2. In combination, a rotary spindle, a longitudinally movable bearingbushing for said spindle, an arm having one end pivoted to said bushingby means of a pivot extending transversely to the axis of said spindle,and a pivotal support for the other end of said arm, said a-rm beingextensible to compensate for changes in distance between the pivotalconnections therefor during longitudinal movement of saidbearing-bushing. y

3. A Sharpener for slicing machines comprising a spindle having agrinder mounted thereon, a longitudinally movable bushing in which saidspindle is journaled, an arm for moving said bushing and spindle in onedirection, an arm pivotally connected with said bushing, and meansco-operating with said arm to hold said bushing against rotation.

4. A Sharpener for slicing machines comprising a spindle, a grindermounted on said 4spindle, a llongitudinally movable bearing saidspindle, a longitudinally movable bushing in which said spindle isjournaled, a spring for urging said bushing in one direction, an armsecured to said bushing and projecting therefrom, a cam for engagingsaid arm to move said bushing against the force of said spring, anextensible arm pivotally connected With said first-mentioned arm andymeans co-operating with said extensible arm to hold said bushing fromrotating. Y

6. In a Sharpener for slicing machines a longitudinally movable bushing,a grinder spindle journaled in said bushing, a shiftable supporty forsaid bushing, an extensible arm pivotally connected with said bushing,and means co-'o'peratingvvith said arms for holding said bushing againstrotation.

v7. A Sharpener for slicing machines comprising a pair of longitudinallymovable grinder supports, a cam for moving said supports, and anextensible armV connected with said supports by pivots having their axesarranged transverselyto the direction or movement of said supports.

l 8. A sharpenerfor slicing'machines comprising a pair of grinderspindles, longitudinally movableV bearing bushings for said spin- 'dles,a spring for each of said bearing bushings an arm for moving saidbearing bushings against the force of said springs, and an arm connectedWith said bearing bushings by means of pivotal connections extendingtransversely to the axes of said bearing bushings respectively, said armhaving telescoping portions to permit independent klongitudiname to thisspecification on this 20th day of May, A. D. 1925. ANTON C. SENSOW.

